Stretchable display module and control method and detection method thereof

Abstract

A stretchable display module and a control method and a detection method thereof are provided. The stretchable display module includes a display panel, a magnetic field generator and a feedback regulation unit. The display panel includes a stretchable closed loop circuit. The magnetic field generator generates a normal phase magnetic field. The feedback regulation unit acquires an induced electromotive force, generated by the stretchable closed loop circuit in the magnetic field, in real time in a stretching process of the stretchable display module, and regulates a stretch state of the stretchable display module according to a magnitude of the induced electromotive force.

What is claimed is: 
     
       1. A stretchable display module, comprising: a display panel, a magnetic field generator disposed on at least one side of the display panel, and a feedback regulation unit electrically connected to the display panel,
 wherein the display panel has a stretchable region and comprises at least one stretchable closed loop circuit surrounding at least a portion of the stretchable region; 
 the magnetic field generator at least covers the stretchable region and is used for generating a magnetic field at least covering the stretchable region and perpendicular to a display surface of the display panel; and 
 the feedback regulation unit is electrically connected to the at least one stretchable closed loop circuit, is used for acquiring an induced electromotive force, generated by the at least one stretchable closed loop circuit under an action of the magnetic field, in real time in a stretching process of the stretchable display module, and regulates a stretch state of the stretchable display module according to a magnitude of the induced electromotive force. 
 
     
     
       2. The stretchable display module according to  claim 1 , wherein:
 the display panel further comprises a peripheral region surrounding the stretchable region; 
 the at least one stretchable closed loop circuit comprises: a plurality of pixel islands, which are disposed in the stretchable region and sequentially separately disposed in a predetermined direction; stretchable wires connecting arbitrary adjacent two of the plurality of pixel islands; and peripheral stretchable traces, which are disposed in the peripheral region and serially connected to the plurality of pixel islands and the stretchable wires in a closed-loop manner; and 
 the feedback regulation unit is electrically connected to the stretchable wires or the peripheral stretchable traces. 
 
     
     
       3. The stretchable display module according to  claim 1 , wherein the stretchable display module further comprises an energy storage unit, which is electrically connected to the at least one stretchable closed loop circuit, and is used for storing the induced electromotive force generated by the at least one stretchable closed loop circuit. 
     
     
       4. The stretchable display module according to  claim 1 , wherein the magnetic field generator comprises a carrier at least covering the stretchable region, and an electroconductive coil or electroconductive ink surrounding an edge of the carrier. 
     
     
       5. The stretchable display module according to  claim 4 , wherein: the carrier comprises a main carrier body and a peripheral structure surrounding an edge of the main carrier body; the electroconductive coil or the electroconductive ink surrounds the peripheral structure; and a material of the main carrier body is a stretchable material, and a material of the peripheral structure is an unstretchable material. 
     
     
       6. The stretchable display module according to  claim 5 , wherein the material of the main carrier body comprises polydimethylsiloxane, and the material of the peripheral structure comprises glass. 
     
     
       7. A control method used in the stretchable display module according to  claim 1 , comprising following steps of:
 generating, by the magnetic field generator, the magnetic field at least covering the stretchable region and being perpendicular to the display surface of the display panel; 
 lighting up and stretching the stretchable display module; and 
 acquiring, by the feedback regulation unit in real time, the induced electromotive force generated by the at least one stretchable closed loop circuit under the action of the magnetic field, and regulating the stretch state of the stretchable display module according to the magnitude of the induced electromotive force. 
 
     
     
       8. The control method according to  claim 7 , wherein the step of regulating the stretch state of the stretchable display module according to the magnitude of the induced electromotive force comprises following steps of:
 determining the stretchable display module as being stretched normally when the induced electromotive force falls within a predetermined voltage range; and 
 determining the stretchable display module as being stretched abnormally when the induced electromotive force deviates from the predetermined voltage range, and regulating a stretching speed of the stretchable display module according to the magnitude of the induced electromotive force deviating from the predetermined voltage range. 
 
     
     
       9. The control method according to  claim 7 , wherein:
 the display panel further comprises a peripheral region surrounding the stretchable region; 
 the at least one stretchable closed loop circuit comprises: a plurality of pixel islands, which are disposed in the stretchable region and sequentially separately disposed in a predetermined direction; stretchable wires connecting arbitrary adjacent two of the plurality of pixel islands; and peripheral stretchable traces, which are disposed in the peripheral region and serially connected to the plurality of pixel islands and the stretchable wires in a closed-loop manner; and 
 the feedback regulation unit is electrically connected to the stretchable wires or the peripheral stretchable traces. 
 
     
     
       10. The control method according to  claim 7 , wherein the stretchable display module further comprises an energy storage unit, which is electrically connected to the at least one stretchable closed loop circuit, and is for storing the induced electromotive force generated by the at least one stretchable closed loop circuit. 
     
     
       11. The control method according to  claim 7 , wherein the magnetic field generator comprises a carrier at least covering the stretchable region, and an electroconductive coil or electroconductive ink surrounding an edge of the carrier. 
     
     
       12. The control method according to  claim 11 , wherein: the carrier comprises a main carrier body and a peripheral structure surrounding an edge of the main carrier body; the electroconductive coil or the electroconductive ink surrounds the peripheral structure; and a material of the main carrier body is a stretchable material, and a material of the peripheral structure is an unstretchable material. 
     
     
       13. The control method according to  claim 12 , wherein the material of the main carrier body comprises polydimethylsiloxane, and the material of the peripheral structure comprises glass. 
     
     
       14. A detection method of a stretchable display module, the stretchable display module comprising a display panel and a feedback regulation unit, wherein the display panel has a stretchable region and comprises at least one stretchable closed loop circuit surrounding at least a portion of the stretchable region; the feedback regulation unit is electrically connected to the at least one stretchable closed loop circuit; and the detection method comprising following steps of:
 providing a magnetic field at least covering the stretchable region and being perpendicular to a display surface of the display panel; 
 lighting up and stretching the stretchable display module; and 
 acquiring, by the feedback regulation unit, an induced electromotive force generated by the at least one stretchable closed loop circuit, and determining a failed position of the display panel according to a magnitude of the induced electromotive force. 
 
     
     
       15. The detection method according to  claim 14 , wherein the step of determining the failed position of the display panel according to the magnitude of the induced electromotive force comprises:
 determining the corresponding stretchable closed loop circuit as being pulled to break and the failed position of the display panel as being located in the corresponding stretchable closed loop circuit when the induced electromotive force is zero. 
 
     
     
       16. The detection method according to  claim 14 , wherein the stretchable display module further comprises a magnetic field generator disposed on at least one side of the display panel; the magnetic field generator at least covers the stretchable region; and the step of providing the magnetic field at least covering the stretchable region and being perpendicular to the display surface of the display panel comprises:
 generating, by the magnetic field generator, the magnetic field at least covering the stretchable region and being perpendicular to the display surface of the display panel. 
 
     
     
       17. The detection method according to  claim 16 , wherein the magnetic field generator comprises a carrier at least covering the stretchable region, and an electroconductive coil or electroconductive ink surrounding an edge of the carrier. 
     
     
       18. The detection method according to  claim 17 , wherein the carrier comprises a main carrier body and a peripheral structure surrounding an edge of the main carrier body; the electroconductive coil or the electroconductive ink surrounds the peripheral structure; and a material of the main carrier body is a stretchable material, and a material of the peripheral structure is an unstretchable material. 
     
     
       19. The detection method according to  claim 14 , wherein
 the display panel further comprises a peripheral region surrounding the stretchable region; 
 the at least one stretchable closed loop circuit comprises: a plurality of pixel islands, which are disposed in the stretchable region and sequentially separately disposed in a predetermined direction; stretchable wires connecting arbitrary adjacent two of the plurality of pixel islands; and peripheral stretchable traces, which are disposed in the peripheral region and serially connected to the plurality of pixel islands and the stretchable wires in a closed-loop manner; and 
 the feedback regulation unit is electrically connected to the stretchable wires or the peripheral stretchable traces. 
 
     
     
       20. The detection method according to  claim 14 , wherein the stretchable display module further comprises an energy storage unit, which is electrically connected to the at least one stretchable closed loop circuit, and is for storing the induced electromotive force generated by the at least one stretchable closed loop circuit.